22 MIDDLESEX FLORA. 



CELASTRACEi^. STAFF-TREE FAMILY. 



Celastrus, L. 



C. scandens, L. Eoxbury Waxwork. Climbing Bitter- 

 sweet. 

 Bather common. June. 



SAPINDACE>^. SOAPBERRY FAMILY. 



Staphylea, L. 

 S. trifolia, L. Bladder-Nut. 

 Weston (Bigelow's Fl. Bost.) ; not since reported in Middlesex, but 

 found (1886) in the adjacent town of Needhara, in Norfolk Co. 

 May-June. 



^SCULUS, L. 



M. HipPOCASTANUM, L. Horse-Chestnut. 



Propagates itself occasionally by seed. May-June. Int. from 



Asia via Eu. 



Cardiospermum, L. 

 C. Halicacabum, L. 



Somerville (C E. Perkins). Adv. from the Southwest. 



For description, see Wood's Bot. & Fl. 



Acer, Tourn. 



A. Pennsylvanicum, L. Striped Maple. 



Concord (Minot Pratt) ; Ashby (L. L. Dame). Pare. May-June. 



A. spicatum,Lam. Mountain Maple. 



Concord, int. from Wachusett by Minot Pratt; Ashby (L. L. 

 Dame). The elevated region about Mt. Watatic seems to be the 

 only county station where this maple grows naturally. June. 



A. saccharinum, Wang. Kock Maple. Sugar Maple. 

 Not abundant. Apr.-May. 



A. dasycarpum, Ehrh. *White Maple. 

 Lowell, Tewksbury, Bedford, et al. Not common native. March- 

 Apr. 



A. rubrum, L, Bed Maple. Swamp Maple. 

 Very common. Apr. 



POLYGALACEy^. MILKWORT FAMILY, 



POLTGALA, Tourn. 

 p. sanguinea, L. 

 Common. July-Aug. 



